WELDED MEMBER

WIPO Patent Application WO/2023/085410

A1

[Problem] To obtain a welded member having excellent corrosion resistance, formed of steel sheets cheaper than pure Ni sheets. [Solution] A welded member according to the present invention is obtained by joining a Ni-plated steel sheet including a Ni plating layer and a Fe-Ni dispersed alloy layer and another steel sheet via a welding portion. In respective surface layers of a weld toe, a region in the vicinity of the weld toe, and the welding portion, a Ni concentration is at least 70% by mass and a Fe concentration is no greater than 30% by mass. In a non-welding portion, the thickness of the Fe-Ni dispersed alloy layer is between 0.5 and 1.5 µm inclusive, and a total thickness of the Ni plating layer and the Fe-Ni dispersed alloy layer is between 2.7 and 14.0 µm inclusive. In the Ni plating layer in the non-welding portion, a total concentration of S and C is less than 20 ppm.

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WO/2016/194400	ARC WELDING METHOD FOR HOT-DIP GALVANIZED STEEL PLATE HAVING EXCELLENT APPEARANCE OF WELDED PART AND HIGH WELDING STRENGTH, METHOD FOR MANUFACTURING WELDING MEMBER, AND WELDING MEMBER

ASADA MISAKI (JP)
FUJIMOTO HIROKI (JP)
TAKAHASHI TAKEHIRO (JP)

PCT/JP2022/042145

May 19, 2023

November 11, 2022

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NIPPON STEEL CORP (JP)

B23K9/23; B23K26/322; C25D5/26; C25D5/50

WO2017006834A1

2017-01-12

JP2017075344A	2017-04-20
JP2005256014A	2005-09-22
JP2014047359A	2014-03-17
JP2014059954A	2014-04-03

HAGIWARA, Yasushi et al. (JP)

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